Electron-discharge device



Aug, 30, 1927, ,503

' r W. G. HOUSKEEPER ELECTRON DISCHARGE DEVICE Filed Oct. 50, 1922 MW I,

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In x WIMIB-L ESLE ALWMUMUM III I structure whereinlateral' lengths of wire,

- means the supporting member.

Fig. 1 and Figs.

Patented Aug. '30, 1927.

. UNITED STATES WILLIAM G. nousxn'nrnn,

COMPANY, INCORPORATED,

PATENT OFFICE.

ELECTRON-DISCHARGE DEVICE.

Applicatiomfiled October 30, 1922. Serial No. 597,748.

This invention relates to electron discharge devices and pertains especially to the electrode. structure thereof.

An object of the invention is anelectrode wires, such as the turns of a wire helix are attached to a .plurality of supporting members by tie wires. Another object of the invention is a method of manufacture of an electrode in 10 accordance with which lateral wires are tied to frame members.

These objects are attained by providing a supporting member to which lateral wires are tied by means, of one or more sinuous the alternate bends of which pass over the lateral wires and the remaining bends of whichpass behind the supporting member. Preferably the lateral wires are attached to the supporting member by of a tie member comprising a pair of the alternate sinusoidal lengths of wire,

bends of which are linked thesupporting memberand the remaining bends of which bind the lateral wires against The tie member is formed by winding a double coil of parallel wires and pressing it),v other desired surface, thus into a plane or forming two interlinked sinusoidal shaped pieces of wire. The wires are moved later ally with respect to each other to bring the links in contact, and the tie member is then 'laid on the helix which is to be tied to the supporting members with its outer bends resting on the turns of the helix and ts interlinked portions lying within the helix. A supporting wire is thenforced between the helix and the interlinked portlons oft-he tie member, thus securing the turns of the 0 grid helix to the supporting member. 1 The turns of the grid tie member clamps the helix securely against the supporting member thereby preventing the turns of the helix from springing away from thesupporting member, and the interlinked portions of the tie member serve to space apart the adjacent turns of the grid helix. This type. of. electrode has the advantage that -no welding operation is required in its manufacture.

Referring now to the, drawings, Fig. 1 discloses an electron discharge device having agrid electrode constructed in accordance with -the invention; Fig. 2 is anenlarged detail between the lines AA and BB of 3 to 7 inclusive disclose together behind shown in Fig. 3 to a definite until the bends 15 of one wire engage the successive steps in the process of manufacture of the grid electrode, "Fig. 7 being on a larger scale.

The grid structure comprises of supporting wires or rods 10 from which a plurality is supported the enclosing grid helix 11.

r The turns of the helix 11 are clamped against the supporting wires 10 by two continuous sinusoidal tie. wires turn of the helix and are interlinked behind the supporting wires intermediate thesuccessive turns. the turns of the helix against the supporting rods and preventslippage of the grid wires. The portions of the'jtie wire which form the interlinkings behind the supporting wire serve to determine the space relation between the adjacent turns of the helix 11. v x

As disclosed in Figs. 3 to- 6 inclusive, the inethod of constructing the grid is as folows:

A .tie member is formed by winding two. fine wires 12 in parallel on a pitch and a definite number of total turns. The ends of the wires 12 are twisted together at each end otthe double-helix as shown-at 14 in Fig. 3, so that there will be exactly the same number of turns in each coil after the tie member has been allowed to back ofi on the mandrel. stretched to a definite length and is then flattened between two parallel surfaces into the shape shown in Fig. 4. This reduces the double coil to a pair of sinusoidal shaped lengths of wire which alternately pass over and under each other. i moved apart laterally as shown in Fig. -5 the bends 16 of the other, forming interlinkings '17 at each complete cycle, and the bends 18 of the. first wire-being oppositethe bends 19 I i of the second. v

The grid wire 11. as shown in Fig. 6, is

mandrel as 12 which pass over each The tie wires effectively bind The double coil thus formed is l The wires are now wound on a collapsible jig 20 having a plu-.

rality of longitudinal slots 21, to form a helix of the desired size and-having the proper space relation between its turns. A. tie member is then laid on the helix 11 along each slot 21 with each set ofopposed' bends 18- and 19 resting on'a turn of the helix 11 and the i terlinkings 17 lying within the periphery of the helix. A supporting wire 10 having a. pointed end '22:is then threaded interlinked portions of the tie member. The introduction of the supporting wire causes the tie member to assume the position shown in Fig. 7 and binds the turns of the helix 11 against the supporting wire 10. The jig is now collapsed and the' grid removed therefrom after which the latter is assembled with V to other electrodes as shown in Fig. 1.

The invention claimed is:

1. In an electron discharge device, an elec-j trode comprising a frame member, a wire helix, and a pair of' wires alternately pass ing over the turns of said helix and being fastened to each other behind said frame member.

2. In an electron discharge device, an electrode comprising a frame member, a wire helix, means for binding said helix tosaid supporting member comprisinga pair of sinuous Wirespassing over the'turns of said helix and being interlinked behind said frame member.

i 3. In an electron discharge device, a frame member, a wire helix, anda pair of tie wires alternately passing over the turns of said helix and being interlinked with each other behind said frame member. v

4. In an electron discharge device, a supporting member, a wire helix, and a sinusoidal length of wire having its alternate bends passing over theturns of said helix; and the remaining' bends fastenedbehind said supporting member;

5. In an electron discharge device, a frame member, a wire helix, and a. pair of sinusoidal lengths of Wire each having its alter nate bends passing over the turns of said helix and having the remaining bends passing-behind said frame member.

6. In an electron discharge device, a frame member, a wire helixfand a pair'of sinusoidal-shaped lengths of wire each having its alternate bends passing over the turns of said helix and the remaining bends joined to ther behind said frame member.

In all-electron discharge device, a. supporting member, a wire helix and a. pair of interlinked sinusoidal shaped lengths of said supporting member and the remaining portlons passing over the turns of said helix. 8. The method which comprises forming a between the turns of the helix 11 and the" Wire, the interlinked portions lying behind tie member-composed of a pair of interlinked sinusoidal lengths of wire, laying said tie member along a wn'e hehx with its free bends lying on the turns of said helix, and

passing a rod between the turns of said helix and the interlinked portions of said tie member.

9.The method which comprises interlinking two sinusoidal shaped lengths of wire,

laying the same on a wire helix with the free bends engaging the turns of the helix, and passing a rod between said turns and said interlinked portions.

10. The method of forming a tie member which comprises wind-ing two wires in parallel to form a double helix and flattening said double helix to form a pair of sinusoidal shaped lengths of wire interlinked at each complete cycle.

11. The method which comprises forming a double coil, flattening said coil, movin the wires of said coil laterally, laying said wires on a helix with the opposed bends thereof resting on the turns of said helix, and passing a rod between the turns of said helix and the interlinked portions of said tie member. v

12. In combination, a frame member, a helix, and means for supporting said helix from said frame member comprising a pair of tie members passing alternately over said helix and interlinking' behind said frame member.

. J In combination, a framemember, a helix, and means for supporting said helix from said frame memberv comprising a pair of sinusoidallengths of wire, each having its alternate bends passing over said helix and the remaining bends interlinked behind said frame member.

' In'witness' whereof, I hereunto subscribe my name this 27th day of October, A. D., 1922. v

WILLIAM G. HOUSKEEPER. 

